CN205608075U - Surge current test fixture - Google Patents
Surge current test fixture Download PDFInfo
- Publication number
- CN205608075U CN205608075U CN201620472280.0U CN201620472280U CN205608075U CN 205608075 U CN205608075 U CN 205608075U CN 201620472280 U CN201620472280 U CN 201620472280U CN 205608075 U CN205608075 U CN 205608075U
- Authority
- CN
- China
- Prior art keywords
- double
- resistance
- throw switch
- rectifier bridge
- pole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a surge current test fixture, including the circuit board, the circuit board is provided with: rectifier circuit, rectifier circuit include a double -pole double -throw, fuse, thermistor and rectifier bridge, and a double -pole double -throw's first motionless end is used for connecting the live wire, and a double -pole double -throw's the motionless end of second is used for connecting the zero line, and a double -pole double -throw first moves the end and be connected to the interchange positive terminal of rectifier bridge through the fuse, and a double -pole double -throw's second moves the end was connected to the rectifier bridge through thermistor interchange negative pole end, discharge circuit, discharge circuit include first resistance, second resistance, third resistance and fourth resistance, electric capacity group, the test voltage table, and output socket. The beneficial effect of the utility model: take place when having avoided the change fuse to touch electric phenomena, prevented that unexpected access alternating current power supply from to the damage of rectifier bridge, and having increased the discharge circuit and allow the power range that passes through.
Description
Technical field
This utility model relates to testing device, is specifically related to a kind of surge current measurement jig.
Background technology
Before Set Top Box and adaptor power supplies dispatch from the factory, need their surge current is tested, with to Set Top Box and adaptation
The performance of device power supply is estimated.Therefore design a kind of device of testing the surge current of Set Top Box and adaptor power supplies is carried out
Problem to be solved during test.
Chinese patent discloses the surge electric current test circuit that a kind of application publication number is CN 102095921 A, is used for testing
Transient state input current during one Switching Power Supply energising, this circuit includes: an out-put supply, a capacitance group and a current measuring instrument,
Described capacitance group is charged by described out-put supply, and described surge electric current test circuit also includes that one is connected to described capacitance group and institute
Stating the IGCT between Switching Power Supply, during described turn on thyristors, described Switching Power Supply is powered and described electricity by described capacitance group
Flow gauge measures described transient state input current.Although this circuit achieves the test of the surge current to Switching Power Supply, but should
The shortcoming that circuit yet suffers from is: 1) owing to two electric fuses of this circuit are directly connected to alternating current power supply, is changing electric fuse
Time alternating current power supply and rectifier bridge connection electric shock phenomenon can occur, jeopardize personal safety；2) unexpected incoming transport power supply, electric current
Rectifier bridge etc. can be caused damage by increase suddenly；3) discharge circuit uses second resistance, it is allowed to the power passed through is relatively
Little, it is susceptible to discharge circuit short circuit, damages capacitance group.
Utility model content
For the deficiency in the presence of prior art, this utility model provides a kind of surge current measurement jig, it is to avoid more
There is electric shock phenomenon when changing electric fuse, it is therefore prevented that the incoming transport power supply damage to rectifier bridge suddenly, and increase discharge circuit
Allow the power bracket passed through.
For achieving the above object, this utility model have employed following technical scheme:
A kind of surge current measurement jig, including circuit board, circuit board is provided with
Rectification circuit, rectification circuit includes the first double-point double-throw switch, electric fuse, thermal resistor and rectifier bridge, first
The first of double-point double-throw switch not moved end is used for connecting live wire, and the second of the first double-point double-throw switch not moved end is used for connection zero
Line, the first moved end of the first double-point double-throw switch is connected to the exchange positive terminal of rectifier bridge, the first DPDT by electric fuse
Second moved end of switch is connected to the exchange negative pole end of rectifier bridge by thermal resistor；
Discharge circuit, discharge circuit includes the first resistance, the second resistance, the 3rd resistance and the 4th resistance, the first resistance,
Second resistance, the 3rd resistance and the 4th resistor coupled in parallel；
Capacitance group, the positive terminal of capacitance group is connected to the not moved end of single-pole double-throw switch (SPDT), and the first moved end of single-pole double-throw switch (SPDT) is even
Connect the cathode output end of rectifier bridge, the second moved end of single-pole double-throw switch (SPDT) connect the first resistance, the second resistance, the 3rd resistance with
And the 4th parallel connected end of resistance, another parallel connected end of the first resistance, the second resistance, the 3rd resistance and the 4th resistance connects
The cathode output end of rectifier bridge, the cathode output end of rectifier bridge is connected with the negative pole end of capacitance group；
Test voltage table, the positive pole of test voltage table connects the positive terminal of capacitance group, and the negative pole end of test voltage table connects electric capacity
The negative pole end of group；And
Accessory power outlet, the positive terminal of accessory power outlet and negative pole end are respectively used to access positive pole and the negative pole of tested device, output
The positive terminal of socket connects the first moved end of the second double-point double-throw switch, and the negative pole end of accessory power outlet connects the second DPDT and opens
The second moved end closed, the first of the second double-point double-throw switch not moved end connects the positive pole of capacitance group, the second double-point double-throw switch
Second not moved end connect capacitance group negative pole.
Preferably, described test voltage table uses direct operated type, and the power supply positive terminal of test voltage table is connected to power supply and turns
The cathode output end of parallel operation, the power supply negative pole end of test voltage table is connected to the cathode output end of power supply changeover device, Power convert
The electrode input end of device connects the first not moved end, negative input connection first of power supply changeover device of the first double-point double-throw switch
The second of double-point double-throw switch not moved end, power supply changeover device is for being converted to DC voltage by alternating voltage.
Compared to prior art, this utility model has the advantages that
1) by arranging the first double-point double-throw switch, it is achieved that the opening and closing between electric fuse place branch road and zero line and live wire,
Achieve and open the first double-point double-throw switch when electric fuse changed by needs, it is to avoid because of suddenly switched on electric fuse, maintainer
Touch circuit generation electric shock phenomenon, improve the safety of maintenance work；
2) by arranging thermal resistor, owing to thermal resistor has a specified zero-power resistance, when it is connected on
Time in electric power loop, it is possible to effectively suppress power-on surge current, and after completing surge current suppression effect, profit
With the continuous action of electric current, the resistance value of thermal resistor is declined the least, therefore thermal resistor is arranged on rectifier bridge
Input, effectively inhibit surge current to be input in rectifier bridge, rectifier bridge protected, and persistently make when electric current
The resistance of used time thermal resistor is little, and the input on rectifier bridge does not affect；
3) by arranging the first resistance, the second resistance, the 3rd resistance and the 4th resistance formation discharge circuit, due to single
The discharge circuit of resistance composition, it is allowed to the power bracket passed through is less, therefore improves discharge circuit by this setting and allows logical
The power bracket crossed, it is therefore prevented that because the excessive discharge circuit of power is short-circuited phenomenon.
Accompanying drawing explanation
Fig. 1 is the circuit diagram on the circuit board of surge current measurement jig；
Fig. 2 is the structural representation of surge current measurement jig.
Detailed description of the invention
As it is shown in figure 1, the utility model proposes a kind of surge current measurement jig, including circuit board, circuit board is provided with
Rectification circuit 3, rectification circuit 3 includes the first double-point double-throw switch SW1, electric fuse F1, thermal resistor NTC1
And rectifier bridge BD1, the first of the first double-point double-throw switch SW1 not moved end is used for connecting live wire L, the first DPDT
The second of switch SW1 not moved end is used for connecting zero line N, and electric fuse is passed through in first moved end of the first double-point double-throw switch SW1
F1 is connected to the exchange positive terminal of rectifier bridge BD1, and thermal resistor is passed through in second moved end of the first double-point double-throw switch SW1
NTC1 is connected to the exchange negative pole end of rectifier bridge BD1；
Discharge circuit 1, discharge circuit 1 includes the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance
R4, the first resistance R1, the second resistance R2, the 3rd resistance R3 and the 4th resistance R4 are in parallel；
Capacitance group 2, the positive terminal of capacitance group 2 is connected to the not moved end of single-pole double-throw switch (SPDT) SW2, single-pole double-throw switch (SPDT) SW2
First moved end connect rectifier bridge BD1 cathode output end, second moved end of single-pole double-throw switch (SPDT) SW2 connects the first resistance
R1, the second resistance R2, the 3rd resistance R3 and a parallel connected end of the 4th resistance R4, the first resistance R1, the second resistance
R2, another parallel connected end of the 3rd resistance R3 and the 4th resistance R4 connect the cathode output end of rectifier bridge BD1, rectifier bridge
The cathode output end of BD1 is connected with the negative pole end of capacitance group 2；
The positive pole of test voltage table M1, test voltage table M1 connects the positive terminal of capacitance group 2, and test voltage table M1's is negative
The extreme negative pole end connecting capacitance group 2；And
Accessory power outlet S2, the positive terminal of accessory power outlet S2 and negative pole end be respectively used to access the positive pole of tested device and negative pole,
The positive terminal of accessory power outlet S2 connects first moved end of the second double-point double-throw switch SW3, and the negative pole end of accessory power outlet S2 is even
Connecing second moved end of the second double-point double-throw switch SW3, the first of the second double-point double-throw switch SW3 not moved end connects capacitance group
The positive pole of 2, the second of the second double-point double-throw switch SW3 not moved end connects the negative pole of capacitance group 2.
Described test voltage table M1 uses direct operated type, and the power supply positive terminal of test voltage table M1 is connected to Power convert
The cathode output end of device AC TO DC POWER, the power supply negative pole end of test voltage table M1 is connected to power supply changeover device AC
The cathode output end of TO DC POWER, the electrode input end of power supply changeover device AC TO DC POWER connects first pair
The first of double-pole double throw switch SW1 not moved end, the negative input of power supply changeover device AC TO DC POWER connects first pair
The second of double-pole double throw switch SW1 not moved end, power supply changeover device AC TO DC POWER is for being converted to alternating voltage directly
Stream voltage.Achieve by arranging power supply changeover device AC TO DC POWER civil power (exchange 220v) is converted to direct current
Electricity (direct current 5v), provides the unidirectional current of needs for test voltage table M1, and the work having met test voltage table M1 needs
Ask, it is not required that power supply, directly for circuit providing civil power just can work, simple and convenient.
As in figure 2 it is shown, this circuit board is placed in tool box 4, the first double-point double-throw switch SW1, the second DPDT are opened
Close SW3 and single-pole double-throw switch (SPDT) SW2 to be arranged on tool box 4 surface, have anti-not putting in tool box 4 surface configuration
Motor structure.This anti-mechanism of not discharging includes time controller, switching power circuit and stands on by single-pole double-throw switch (SPDT) SW2
Stand 51, stand 51 is provided with the slide rail 511 being positioned on vertical direction, on slide rail 511 slide be provided with slip
Block 54, sliding shoe 54 is provided be positioned on vertical direction press post 53, stand 51 top is provided with hydraulic cylinder 52,
The piston rod of hydraulic cylinder 52 is connected with sliding shoe 54, and hydraulic cylinder 52 is defeated by hydraulic cylinder 52 controller and time controller
Going out end to be connected, the exchange positive terminal of switching power circuit and first moved end of the second double-point double-throw switch SW3 connect, and open
Second moved end of the exchange negative pole end and the second double-point double-throw switch SW3 that close power circuit connects, the input of time controller
The cathode output end of end connecting valve power circuit, switching power circuit is for by the second double-point double-throw switch SW3 junction
Photovoltaic conversion be the voltage that time controller input can identify.When the second double-point double-throw switch SW3 Guan Bi, time
Between the input of controller receive voltage signal (i.e. testing commencing signal), time controller starts timing, presets wave
Gushing the time required for testing current experiment, after the time arrives, time controller controls liquid by hydraulic cylinder 52 controller
Cylinder pressure 52 operates so that presses the end tilted when 53 times pressure single-pole double-throw switch (SPDT) SW2 of post connect rectifier bridge BD1, makes
Obtain single-pole double-throw switch (SPDT) SW2 and be connected to discharge circuit 1, so that capacitance group 2 to be discharged, it is to avoid because capacitance group 2 is not discharged
Time touch occur electric shock phenomenon.
Its operation principle is: before Ce Shi, the first double-point double-throw switch SW1, the second double-point double-throw switch SW3 are pushed " OFF "
Position, to avoid being charged capacitance group 2 when not using, and single-pole double-throw switch (SPDT) SW2 is allocated to and discharge circuit 1
The position connected, has electricity to store and electric shock phenomenon occurs in preventing capacitance group 2.During test, first, civil power (220v electricity is connected
Source), owing to thermal resistor NTC1 has a specified zero-power resistance, when it is connected in electric power loop, just
Can effectively suppress power-on surge current, and after completing surge current suppression effect, utilize the continuous action of electric current,
The resistance value of thermal resistor NTC1 is declined the least, suppression surge when therefore thermal resistor NTC1 only plays start
The function of current, after current stabilization, thermal resistor NTC1 resistance can be ignored, and civil power is converted into unidirectional current by rectifier bridge BD1
Pressure, now power supply changeover device AC TO DC POWER exports direct current 5v voltage, and the test job of test voltage table M1 is accurate
Standby ready；Then, the first double-point double-throw switch SW1 is pushed " ON " position, single-pole double-throw switch (SPDT) SW2 push with
The first moved end (that is: position of " charging ") that rectifier bridge BD1 connects, (notes observing test electricity after capacitance group 2 is fully charged
Pressure table M1, this test voltage table M1 is D/C voltage table, i.e. represents and have been filled with electricity after voltage stabilization), can carry out following
Test；After again, carry out test job, tested device is received accessory power outlet S2, the second double-point double-throw switch SW3 and dials
Can test to " ON " position, carry out with the surge current to tested device (Set Top Box, power supply adaptor etc.)
Test；Finally, after being completed, the first double-point double-throw switch SW1, the second double-point double-throw switch SW3 are pushed " OFF "
Position, and single-pole double-throw switch (SPDT) SW2 is pushed second be connected with discharge circuit 1 not moved end (position of i.e. " discharging "),
Capacitance group 2 is discharged, during to prevent from touching capacitance group 2, electric shock phenomenon occurs.
Finally illustrating, above example is only in order to illustrate the technical solution of the utility model and unrestricted, although with reference to relatively
This utility model has been described in detail by good embodiment, it will be understood by those within the art that, can be to this practicality
Novel technical scheme is modified or equivalent, without deviating from objective and the scope of technical solutions of the utility model, its
All should contain in the middle of right of the present utility model.
Claims (2)
1. a surge current measurement jig, it is characterised in that include that circuit board, circuit board are provided with
Rectification circuit, rectification circuit includes the first double-point double-throw switch, electric fuse, thermal resistor and rectifier bridge, first
The first of double-point double-throw switch not moved end is used for connecting live wire, and the second of the first double-point double-throw switch not moved end is used for connection zero
Line, the first moved end of the first double-point double-throw switch is connected to the exchange positive terminal of rectifier bridge, the first DPDT by electric fuse
Second moved end of switch is connected to the exchange negative pole end of rectifier bridge by thermal resistor；
Discharge circuit, discharge circuit includes the first resistance, the second resistance, the 3rd resistance and the 4th resistance, the first resistance,
Second resistance, the 3rd resistance and the 4th resistor coupled in parallel；
Capacitance group, the positive terminal of capacitance group is connected to the not moved end of single-pole double-throw switch (SPDT), and the first moved end of single-pole double-throw switch (SPDT) is even
Connect the cathode output end of rectifier bridge, the second moved end of single-pole double-throw switch (SPDT) connect the first resistance, the second resistance, the 3rd resistance with
And the 4th parallel connected end of resistance, another parallel connected end of the first resistance, the second resistance, the 3rd resistance and the 4th resistance connects
The cathode output end of rectifier bridge, the cathode output end of rectifier bridge is connected with the negative pole end of capacitance group；
Test voltage table, the positive pole of test voltage table connects the positive terminal of capacitance group, and the negative pole end of test voltage table connects electric capacity
The negative pole end of group；And
Accessory power outlet, the positive terminal of accessory power outlet and negative pole end are respectively used to access positive pole and the negative pole of tested device, output
The positive terminal of socket connects the first moved end of the second double-point double-throw switch, and the negative pole end of accessory power outlet connects the second DPDT and opens
The second moved end closed, the first of the second double-point double-throw switch not moved end connects the positive pole of capacitance group, the second double-point double-throw switch
Second not moved end connect capacitance group negative pole.
Surge current measurement jig the most according to claim 1, it is characterised in that described test voltage table uses straight
Connecing operated type, the power supply positive terminal of test voltage table is connected to the cathode output end of power supply changeover device, the power supply of test voltage table
Negative pole end is connected to the cathode output end of power supply changeover device, and the electrode input end of power supply changeover device connects the first double-point double-throw switch
The first not moved end, the negative input of power supply changeover device connects the second of the first double-point double-throw switch the not moved end, Power convert
Device is for being converted to DC voltage by alternating voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620472280.0U CN205608075U (en) | 2016-05-23 | 2016-05-23 | Surge current test fixture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620472280.0U CN205608075U (en) | 2016-05-23 | 2016-05-23 | Surge current test fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205608075U true CN205608075U (en) | 2016-09-28 |
Family
ID=56949518
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620472280.0U Expired - Fee Related CN205608075U (en) | 2016-05-23 | 2016-05-23 | Surge current test fixture |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205608075U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843759A (en) * | 2017-09-28 | 2018-03-27 | 北京空间技术研制试验中心 | The surge current test system and method for testing of electronic equipment in spacecraft |
| CN110988447A (en) * | 2020-01-04 | 2020-04-10 | 广东新成科技实业有限公司 | Circuit diagram of surge current impact tester |
-
2016
- 2016-05-23 CN CN201620472280.0U patent/CN205608075U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107843759A (en) * | 2017-09-28 | 2018-03-27 | 北京空间技术研制试验中心 | The surge current test system and method for testing of electronic equipment in spacecraft |
| CN110988447A (en) * | 2020-01-04 | 2020-04-10 | 广东新成科技实业有限公司 | Circuit diagram of surge current impact tester |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7427855B2 (en) | Circuit for measuring inrush current | |
| CN2901330Y (en) | AC/DC withstand voltage insulation detector with high precision and high speed detecting and control circuit | |
| CN205608075U (en) | Surge current test fixture | |
| CN202600057U (en) | Enablement integrated tester for high-capacity electrolytic capacitor | |
| CN109596923A (en) | Frequency converter bus capacitor on-line measuring device, method and frequency converter | |
| CN102095921A (en) | Surging current test circuit | |
| CN110018406B (en) | Double-pulse test system | |
| CN203705523U (en) | Multifunctional integrated comprehensive test bench | |
| CN107493092A (en) | Big pulse current generating device and its control method | |
| CN201130861Y (en) | Intelligent integration power condenser | |
| CN203705524U (en) | Universal multifunctional integrated comprehensive test bench | |
| CN208046249U (en) | Three-phase imbalance commutation device | |
| CN101237147A (en) | Integrated power capacitor | |
| CN206757445U (en) | A kind of compensation programmable low-voltage, high-current DC constant current power supply of electronic load | |
| CN201449441U (en) | Integrated tester for action voltage of DC switch coil | |
| CN208971142U (en) | A kind of pre-charging device of train regenerative braking energy feedback system | |
| CN206498211U (en) | A kind of battery control circuit | |
| CN105896553A (en) | Intelligent three-phase split reactive power compensation device | |
| CN204031039U (en) | A kind of voltage shock avoiding motor intelligent manager | |
| CN204832485U (en) | A frequency conversion electron source for 750kV level CVT on -site proving system | |
| CN210954270U (en) | Fuel cell test bench | |
| CN108572319A (en) | Batteries in parallel connection set detecting device and method | |
| CN209486171U (en) | A kind of switchgear divide-shut brake coil resistance indirect measurement system | |
| CN207516514U (en) | A kind of high-speed circuit breaker testing stand | |
| CN203774859U (en) | Single-chip microcomputer-based double-power-source switching control circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170327 Address after: Hongqi Town Jinwan District golden grain road 519090 Guangdong province Zhuhai City No. 2, No. 1 building sixth room 602 Patentee after: Zhuhai Canyuan Electronic Technology Co.,Ltd. Address before: Jiang Xi Road 401336 Chongqing Nan'an District No. 11 No. 11-2 A2 second Patentee before: CHONGQING BRIGHT SOURCE ELECTRONIC CO.,LTD. |
|
| TR01 | Transfer of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160928 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |